Table 5 Inclusion-exclusion criteria

Research articles written in English language are included

Papers published except than English language are excluded

The focus is to include primary studies such as original research papers

Papers failed to provide answer to the RQs or failed to answer the topic are not included

Workshops, thesis, book chapters and magazines related to our studies are selected

Papers identifies as “Grey” are excluded from our studies

Research papers from 2002 to 2020 have been included for answering the questions

Redundant papers are excluded

Research papers from reliable and authentic source selected

Research articles comprised of three or less than three pages are also eliminated from our studies